Mechanics

ENGINE FAILS TO START AFTER REP

1997 BMW 540i

Electrical problem
1997 BMW 540i V8 Two Wheel Drive Automatic 85,000 miles

Recently I let the car battery die from not driving the car for an extended period. I attempted to start it and it initially clicked but did not turn over. I then attempted to jump start it using my MINI connected direct to battery. It recharged it sufficiently to light everything up but failed to turn the engine or emit any sound at all. I then had the battery replaced by AAA service and everyhting lit up again but failed to turn the engine at all. AAA did apply a memory saver to the system prior to replacement. It is possible the power level was so low when I first tried to start it that it killed off any memory aspects it was retaining. Or perhaps my jump start fried something tho' I know everything was connected correctly. My call to the dealer said it could be the ignition or the starter but last time I started the car there was no indication of any abnormality in the engine starting tho I could tell the battery was not real strong at that time. So my question is: could it be the systems the dealer spoke about or is it possible something electronic such as a fuse or memeory module that needs to be reset or replaced? As I am unemployed I need to know which direction I am headed cost wise before I embark on spending money I do not have. Thanks.
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Clk
April 29, 2010.



Brenda Lee sang that song didn't she, " I'm sorry" Your description is quite good and I think what you will find is that the voltage excursion you took when you did what you did has upset the EWS/DME alignment. This alignment is a handshake that is required to allow the operation of the starter and fuel/ignition to occur. You will possibly need to have the car towed to the dealer or repair facility of your choice to have the car diagnosed as the repair facility will not allow my diagnostic in the door, but at least you have an idea.

Dr. Hagerty
Apr 30, 2010.